Model electric locomotive



June 3, 1952 w. G. STEWART MODEL ELECTRIC LOCOMOTIVE 7 Sheets-Sheet 1Filed Jan. 16. 1947 @518,LWMEL INVENTOR BY m W f ATTORNEYS w. G. STEWART,138

MODEL ELECTRIC LOCOMOTIVE I I I '7 Sheets-Sheet 2 June 3, 1952 FiledJan. 16. 1947 EY n INVENTOR ATTORNEY June 3, 1952 w. G. STEWART MODELELEK JTRIC LOCOMOTIVE 7 Sheets-Sheet 4 Filed Jan. 16. 1947 INVENTOR WM/$M ATTORNEYS June 3, 1952 w. G. STEWART MODEL ELECTRIC LOCOMOTIVE 7Sheets-Sheet 5 Filed Jan. 16. 1947 r INVENTOR l aw/$ M ATTORNEYS June 3,1952 w. G. STEWART 2,599,138

MODEL ELECTRIC LOCOMOTIVE Filed Jan. 16. 1947 7 Sheets-Sheet 6 r37 'IH I'32 Tij.l5.

lli

INVENTOR l fi ATTORNEYS June 3, 1952 w, STEWART 2,599,138

MODEL ELECTRIC LOCOMOTIVE Filed Jan. 16. 1947 7 Sheets-Sheet '7 PatentedJune 3, 1952 MODEL ELECTRIC LOCOMOTIVE- Willis G. Stewart, Portsmouth,R. L, assignor to Midgage Models, Inc., Portsmouth, R. I., a corporationof 'Rhode Island Application January 16, 1947, Serial No. 722,431

9 Claims. 1

This invention relates to scale model railway trains and moreparticularly, to a method of construction and assembling of all parts ofa scale model railway passenger train with the exception of the trucks.The trucks to be used with the passenger cars on this train aredescribed in my copending application, Serial No. 699,400, now U. S.Patent No. 2,522,317, dated Sept. 12, 1950.

One object of my invention is to provide an extruded car section thatmay be used as the basic section of either a streamlined passenger car,or a streamlined freight or passenger train locomotive or as the basicsection of an observation car.

Another object of my invention is to provide a basic car section withthe various modifications mentioned above that is faithful to Prototype.

Another object of my invention is to provide a method of connectionbetween streamlined passenger cars that is faithful to prototype. Thisis achieved by using a molded rubber diaphragm fitted to the vestibulesection of each passenger car. I

A further object of my invention is to provide an extruded basic carsection having internal fittings which allow for the insertion of afloor board and also for the insertion on each side thereof ofcontinuous strips of transparent material which will act as windows forthe passenger car. By using the continuous strips of transparentmaterial bulging at the windows is prevented and a high degree offaithful adherence to the appearance of prototype is achieved. Inaddition, by extruding the car section the external appearance ofprototype, namely the corrugated side, is also achieved.

A further object of my invention is to provide an electric engine thatis capableof picking up power from double polarized track without fearof short circuit. This engine is so constructed that its driving wheelsare allowedfreedom of vertical movement without causing the drivinggears to get out of mesh.

A further object of my invention is to provide a novel method ofsuspension of this motor in the forward part of the locomotive cab.

Other objects and features of my invention will make themselves apparentduring the course of the following description when taken with theaccompanying drawings in which:

Fig. 1 is an end view of a completed passenger car;

Fig. 2 is a side elevation of apassenger car with the diaphragmattached; t

Fig. 3 is a cross sectional view taken on line 33 in Fig. 1; I

Fig. 4 is a cross sectional view taken on line 4-4 in Fig. 2;

v Fig. 5 is a side elevation showing two cars and their method ofconnection.

Fig. 6 is a cross sectional view taken on line 6-6 in Fig. 1;

Fig. 7 is a cross sectional view taken on line 1-1 in Fig. 1;

Fig. 8 is a section of an extruded car body in perspective;

Fig. 9 is a cross sectional view taken on line 9-9 in Fig. 3;

Fig. 10 is a side elevation of a freight car locomotive employing theextruded car body section;

Fig. 11 is across sectional view taken on line |l-Il in Fig. 10;

Fig. 12 is a front elevation of the locomotive head shown in Fig. 10; i

Fig. 13 is a cross sectional view taken substantially on line l3-l 3 inFig. 10;

Fig. 14 is an end view of an observation rear car section;

Fig. 15 is a side view of the basic car sectio with the observation carsection attached;

Fig. 16 is a cross sectional view of the electric motor; 7 i

Fig. 17 is an end view of a detail in Fig. 16;

Fig. 18 is a bottom view of a detail in Fig. 16;

Fig. 19 shows a welded plate and suspension gigoklihat fits the bottomof the motor shown in Fig. 20 shows a cross sectional view taken on line20-40 in Fig. 17.

Similar parts and similar figures have been identically numbered.

At the outset it should be noted that the truck shown in Figs. 1, 2, 4,14 and 15 is described in my copending application, Serial No. 699,400,1113;; U. S. Patent No. 2,522,317, dated Sept. 12,

Referring now to the drawings, and particularly to Figures 1 and 2 inwhich the completed passenger car is shown, I indicates the extruded carbody section, 2 indicates the vestibule section in place and 3 indicatesthe rubber diaphragm attached to the vestibule section 2. In

Fig. 2 are shown the windows 4 and the'door 5.

' the slots 9. The vestibule section, I2 isametal casting, and,referring to Fig. '9Ifis.hldinplace, in the slots 9 by metalscrews I 4'.The coupler I5 is held in place by the nut and bolt assembly I5 shown inFigs. 3 and 9 and the. rubber diai phragm 3 is glued to the vestibulesection I2, The position of the metal retaining screws I4 is shown inFig. 7, as isthe position of the nut and-bolt assembly- I6.-

Referring now to Fig. 4, I1 indicates the fair ings which are attachedto the side bases 18' of the extruded car body section by means ofwoodscrews I9 which pass through,'and retain' in place, the floor board II.The fairings may alsobe extruded-with the car section as an integralpart of it. The truck recesses shown in Fig. 15 would then have to bemachined out.

Referring now to Fig. 9 the metal screws I4- also pass through thefairing H and; the base I8 of the extruded car body section. V

' Referring now to Figs. 10, 11 and l3, 2 9 indicates a lug castintegrally with the; locomotive head which is positioned in the extrudedcar section that makes up the rest of the locomotive and-metal 'screw2I-is counterfsunki'through the top of the extruded carbody'section andthe lu 29. Two additional lugs 22 and 23f are inserted in slots '9 oftheeXtrudd-car body section and retained in position by metal'screws Z4and 25,

Fig. 11 shows the method of attaching'the oil tank "to the underside ofthe extrudedcar body section when-used 'aspartof a locomotive. A

, cast section 2a "is placed in the slots 9" ofthe extruded car bodysection prior to the attachment of the locomotive head and positionedwith its center atline I I II;in Fig 10. Metal screws ZI are thenmserted: retaining thecastsection in place. The cast section 26 is socast that its. exterior is a faithful reproduction of an oil tank on itslarger brother. I

Figs. 14 and 15 illustrate a simi l'ar method of attachingan observationcar rear section zg'toan, extruded ca r body section. The'lu: 29,castimtegrallyiwith; theobservation' car section," is posi tioned-at-theroof in the extruded car body 'sec 7 tion and a metal screw 3,0;i'scounteresunk 111313118" roof ofthe extruded car bodysection; 'I'woaddivtionalprojecting lugs 3h corresponding n and fitting l ha ei t sli p sf, he; x r ded car' body section are cast integrally with theobservation carsect-an and these; l'ugs after ing y' l 'si sw fli It isto benotedin attaching the various see-i.

sertion into the-slots: 9,} are retained in positien I me to h iiesdican ody c iontiiatt,m interior of the roof of the extruded car bodysectionis flat as showngin Fig. 13:;wh-ile th exterior of the ro f isround ed giving the can a-high degree of faithfulness to prototype.

' on'the commutator 81.

4 by passing the longitudinal spacers 56 through prepared holes in thevertical leg of the inverted L-shaped member 55. A spacer '53 having aprepared aperture for the insertion of the locknut 52 is positionedbetween the inverted L-shaped member 55 .and.. .th e roof;5,I, Asshown-inFig. 13 the, L-shaped member is; flared downwardly so that bothlongitudinal spacers are able to pass through the opposite baseextremities of the vertical leg of the inverted L-shaped member 55. Theelectric motor is of the conventional type having awormgear system oftransmitting power tov the wheels. The gears 51 are attached to therotor 58--at each extremity thereof and are meshed .with the drivinggears 59 and 60. The forward gearing system: is enclosed in a hollowblock SI of. dielectric material which is retained in attachment andalignment with the rotor shaft by means of the longitudinalspa-cers 56positioned as shown in Fig. 1'7. The opposite extremities of the rotorshaft 58; are positioned in an oil lube bearing 52 set in the dielectricblock H and a; similar oiljlube bearing 63' set in the hollowed outbrass frame which contains the gear sys-- tern located. at the rear of'the motor. Fig. 18 showsa bottom plan view of" this hollowed-outbrassframe with an'aperture-65 for the driving gear which attached tothe-middle of the-axle 551 The longitudinal spacers 56' retain the brassframe 64 and the dielectric block 6| in attachment'andalignment with'therest of the motor by passing through the block IEI the field lamina--tions (not shown) and thence through the first shoulders 61 of the;brassframe 64.

of dielectric material; 68 is shown positioned over A collar the middlesection69- off the brassframe 64- and is retainedin lateralposition by asnapring; 19

driving gear will remaihinmesh with; the sear "attached tof the rotorshaft? at at times. This. llow n i e: o e t h gh: e z v rough "track,without fear of; derailment:

'Ifo prevent 'the motor 54 from pickingv-up any metallic objectsthat maybe; lying onthe track bed; a plate 12 as shown in; Fig. l9 -is-welded toacarryingbrace I3 as'shown-in' 19, The plate 12' has prepared screwholes 14 cor-respondingto screwrecessesin the brass frame andlocated onthe underside thereof; indicated at '15. Metal screws 16- aroused toattach and: align'the plateTZ-f'to the undersideofithe elec-- tric motor54; m this manner themagnetic fieldcreated by the operation of th'emotor-is;

effectively confined within the underside of the motor' 54 and thetopside of'the plate 1 2*.

The carrying brace-l3 isused-for theattachment; of cast sectionssimulating the journal boxes and' springs of the locombtive'drivingwheels and is shown in-Fig. IOEatT-l: Thesecast 13' by means of ordinaryrivets.

Fig. 17 is an end view of the dielectric block- 6 I- andindicates thepositioning of the longitu dinal spacers 56 and the brushes 8'2-whi chbear sections 11 are attached t'o thej carrying braee Fig. 20 showsacross- 7 sectional view of the method of 'keepingthe brush in contactwith the commutator 8|. brush 82 is forcedoutward by the compressedspring 83 which is retained under compression by the screw 84, all ofwhich is contained in a copper sleeve 85.

The electric motor 54 is designed to run on double polarized track andas a consequence one wheel on each driving axle is insulated, each.

wheel insulated being opposite toeach other. Thisis achieved by pressingon to the metal axle a sectional band of dielectric material (notshown). The circuit is completed by the two uninsulated wheels, onepositive, the other negative, the current being taken from one wheel tothe brushes through the motor and thence to the other or negativelycharged wheel. The motor is of the conventional type having its fieldwinding located above the armature and field laminations extendingdownward from the field winding to the underside of the stator.

As shown in Fig. 13 the engine is attached to the cast locomotive cabsection just forward of the cab sections point of attachment to theextruded car body section.

All of the fittings and apertures shown in Fig. will be stamped in theextruded car body section and the exhausts 85A will be retained inposition by metal screws. The beading 86, shown in Fig. 8, will bemachined off in all places where necessary and door outlines will beinscribed on the metal itself.

Inasmuch as the locomotive will come in two sections, it will benecessary to place a vestibule cast section in the rear of the forwardlocomotive section and in the front of the rear locomotive section. Asectional brass bar 81 will be attached to the coupler holder I 6. asshown in Fig. 9. Enough leeway will be left between the front and rearsections of the locomotive to allow it to negotiate curved track.

These units will be manufactured and sold to the public as kits and willbe assembled by the user. By use of the various cast sections andelectric motor in connection with the extruded car body, a comparativelysimple method of assembling has been provided as well as anexceptionally high degree of faithfulness to prototype. v

I claim:

1. A scale model railway train, having in combination, one or morepassenger cars each comprising an extruded car body section havinginternal slots at the base of each side thereof for reception of a floorboard and internal longitudinal shelves having opposed grooves.

therein on each side of said extruded car body section for reception ofcontinuous strips of transparent material in planes parallel to andadjacent the said sides, fairings running the length of each side of theextruded car body section and attached to the base of said extruded carbody section by screw means, cast vestibule sections inserted at eachend of said extruded car body section, said cast vestibule sectionhaving wings for insertion into said internal slots of said extruded carbody section and said vestibule cast section being retained in positionby screw means passing through said fairings and said slots and saidwings of said vestibule cast section, a molded rubber diaphragm glued tothe outer extremities of said vestibule cast sections to simulate apassageway between said scale model railway train passenger cars, and a1000- motive comprising said extruded car body section attached to thefrontal section of a streamlined locomotive and an observation carcomprising said extruded car body attached to a simulation of the rearsection of an observation car, said locomotive and observation. carsections having cast integrallywith them projecting lugs for ine sertioninto the prepared recesses of said extruded car body section andretained therein by screw means, all of said cars and said locomotivebeing detachablycoupled together to form said train.

2. Ina scale model railway train an electric motor for mean doublepolarized track having a drive shaft and a worm gear system at eachextremity of said drive shaft for transmission of power to the drivingaxles, said forward worm gear system being encased in a hollowed outblock of dielectric material through the base extremities of which passthe axle, said block having positioned in it a bearing for holding andaligning the forward end of said drive shaft, and said blockbeing'retained in position and alignment with the motor by longitudinalspacers passing through the opposite sides of said block and thencethrough the field laminations of said motor; a rear worm gear systemencased in a hollow metal frame, said frame being retainedin'position'and alignment by said longitudinal spacers, said framehaving in rotating alignment with it a-collar of dielectric material, arear driving axle positioned in the opposite base extremities of saidcollar, said collar being retained in position by a snap ring positionedin a groove in said frame, and said collar with axle and wheel assemblyattached being capable of 'rotative movement around the drive shaft,said rotative movement being limited to the width of an opening on theunderside of said frame through which emerges the driving gear if saidrear worm ear system.

3. A- scale model streamlined railroad rolling stock body comprising, incombination, an extruded metal channel section having anexterior formedto reproduce the general contour of the sides and top of a full sizestreamlined railroad rolling stock body and having an interior formed toprovide mutually opposed longitudinally extending inwardly projectingribs along the bottom portions of the section's sides, and havinglongitudinally extending panel portions in said sides and in whichopenings are formed to reproduce the side openings of said full sizebody, and bodyfinishing end assemblies externally reproducing thegeneral contour of the end assemblies of said full size body and adaptedto fit the ends of said section and having inwardly projecting wingsadapted to be slid along said ribs during installation of saidassemblies to said section, whereby said wings and said ribs cooperatein positioning said end assemblies.

4. A body as defined by claim 3 with the section defined by said claimhaving its interior further formed to provide second ribs adjacentlyspaced from each of the ribs defined by said claim and defining slots,the wings defined by said claim being adapted to slide into said slots.

5. A body as defined by claim 3 with the there defined section havingits interior further formed to provide a pair of longitudinallyextending vertically spaced ribs on each interior side above the ribsdefined by said claimand straddling the there said exterior panelportions and openings, the ribs of said pairs in each instance beingformed to define vertically opposed slots and with strips ofopening-closing material adapted for sliding reception by said slotsprovided by said rib pair's; the end assemhlieedefinedby said ole-hrsbeing-adapted" to close the? ends of said slotsiof said rib pairs when:applied; to said section.

of the there said end assemblies provided near itstop with an inwardly:projecting lug adapted to engage beneaththe bottom. of theitoowebof thethere saidextrnd'edisectiom '72 scale model: railroad rolling stock. assembly comprising a channel section inverted to form a car body. avtruck. and a column extending upwardly from: saidi truck' inside said.channel. and pivotally connecting with: theJQOt'? tom. orv inside of thetopzweb-of: said-channeh to carry the latter, said truck being-:poweredby a; combination including. axles: with; pinions" fixed:

thereto, a. solid: continuous: electric: motor arma ture.:shaftextending transversely over-saidlaxles andihaving worm. gearsmeshed:with.-said pinions; ahollow formembracing one of said wormegears.and: the. one of said. pinions; meshing: therewith;

and solidly journaling the adjacent; end of; said-v 1 said cylindrical 1surface. of said .secondzfornrand.

journaling this secondlonerof said-axles;

8; A scale. model railroad rolling: stock. power; truck including: thecombination; of: axles; with.

pinions; fixed. thereto, a. solid; continuouselectric: motor: armatureshaftiextendingtransversely over.

said axles. ;and;having worm: gears meshed; with". saidpinions,a-hollowformrembracing one ofisaid. worm gears and the one of saidpinions meshing. therewithandjsolidly,'jdurnalingathezadjacenhend ofsaidshaftandither one oisairtaxles; adjacent.-

thereto; a second; hollow fornrt emhracing1the;

second, one: of: said: worm: gears: and; pinions; but:

8 journalingonlytherel *tiv'ely" adjacent end of said' -shatt 'andhaving a cylindrical outside surface "s'ubstantially concentric-to thesecond Worm gear; means for rigidly interconnecting said forms, and acollar member having a cylindrica1 surface riding on said: cylindricalsurface of said second form and journaling. this second one of said.axles.

9; A scale model streamlined railroad rolling stock bodyi'comprising' anextended metal chan-- nel sectio'n. having an exterior formedtoreproduce the generalicontour of the-sides and top-ofra full; sizestreamlined railroad rolling stock body and: having an. interior formedto' provide mutu ally: opposed. longitudinallyextending inwardlyprojecting. ribs along the. bottom portions. of the sections=sides.= andhavinglongitudinally: extending: panel: portions in: said:- sidesand inwhich openings are 1 formed: to reproduce the. side: openings of saidfull size'b'ody, and. thesides'and top' of said section: extending:straight. and said sides being mutually parallel from end toend of: saidsection. and said section. having. an open end through which a floorstripzmay be slid longitudinally. on saidiribs horizontally betweenthe'sides of 1 said. section.

WILLIS; G. .S'IE'WART;

REFERENGES: CITED;

The following references are of record in' the file of this patent:

UNITED STATESIPATENTS- Number Name: Date 901,921 Markman: .0cjt.20,119.08: 1,236.;1149. Coventryua -.Aug. 7;.19'17 1 ,84'5;201' ShepardFeb-.16, 1932 1 691-340 Westermana v Dec. 20., 19.32 2,019,690. McKeige"Nov; 5, 1935 2,039,055 Bonanno Apr. 28; 1936' 2,098,124- Yancey Nov. 2,1937 2,114,720; 'McKeige. Apr: 19., 1938 2,272,280. Stoltz Feb. 10,19.42-

